超临界萃取技术在食品上的应用（Application of supercritical extraction technology in food）.doc

超临界萃取技术在食品上的应用（Application of supercritical extraction technology in food） The application of supercritical carbon dioxide fluid extraction in the food industry Pick to The application of acid, natural pigment and natural flavor were introduced. Simultaneous pair Prospect of CO2 fluid extraction technology in the world The future. Keywords  Supercritical Carbon Dioxide Supercritical fluid Extraction of   food Carbon Dioxide Extraction the Abstract: This paper reviews the researches on Supercritical CO 2 fl uid Extraction and its Application in five aspects (containing drinks, lipids, polyunsaturated fatty acid, natural Pigment and natural perfume). At last  This paper prospects the its development in the future. Key words: CO 2 supercritical fluid; Extraction; The food Supercritical flu id extraction (SFE) is 70 years old An extraction and separation technique developed in the age of supercritical fluid (supercritical fluid) The characteristics of both gas and liquid are close to the liquid, and the viscosity and diffusion coefficient are close to the gas It not only has the solvent of liquid solvent, but also has excellent mass transfer performance Is CO2 fluid is widely applied, its critical temperature for 31. 265 ℃, critical pressure for 7. 18 mpa, is near The boundary conditions are easy to achieve. Under supercritical conditions, the density of CO2 fluid changes to temperature and pressure Sensitive, its solubility and pressure are proportional to a certain range, and thus can change the temperature of the system And pressure to change the solubility of the extract, so that it can be separated and extracted The purpose is that sfe-co2 is an environmentally friendly green chemical technology [1], so it has become In this paper, supercritical CO2 in recent years is reviewed in this paper The application of sfe-co2 in the food industry. 1. Supercritical extraction principle When the temperature and pressure of the fluid are at its critical temperature and pr